HI
At the very start of my Career I worked at Westlands at Yeovil on composites development.
We built a prototype tailboom for the scout from all Unidirectional High Modulus Carbon fibre ( there was not any woven product available in the mid 70's).
I witnessed the destructive test and I will never forget the load crack when it failed , to call it an explosive failure was an understatement.There were bits of tailboom all over the hangar. If I am not mistaken it exceeded design load by quite a factor .
I would suspect that the machine laid tape would be interleaved with woven fabric on any new blade , especially at the root .
Neil